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AlgaeFree Serious Stain Remover $29.99
AlgaeFree Serious Stain Remover

AlgaeFree Serious Stain Remover

$29.99 $40.99You save 27%
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  • Ships from Ontario, Canada
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Detailed Product Description

Single AlgaeFree Serious Stain Remover pouch.

Heavy Duty Serious Stain Remover eliminates mineral discolouration and organic stains from pools & spa surfaces without draining the water. Potent organic acids combined with powerful chelating agents dissolve mineral stains such as iron, calcium, manganese etc. Plus stains from algae, dead blackspot, leaves and other organic material are also removed. It is a DIY pool treatment suitable for all vinyl, fibreglass, concrete and pebblecrete pool and spa surfaces.


  • DIY Pool Treatment
  • Removes Organic & Mineral Staining
  • No Need to Drain Water

Directions for use:

First: For best results let the chlorine level fall to 0ppm and adjust pH to 7.0. Backwash or clean the pool or spa filter and turn it off. Remove all plastics including covers, hoses and cleaners. DO NOT SWIM or filter during treatment until water has rebalanced and sanitized.

Recent Stains and Vinyl liners: For pools, add 200g of SeriousStain Remover per 10,000 liters of pool water (1.2kg per 60,000) dissolved in 10 liters of water and pour around edges of the pool. In spas use 100g per 2000 liters. This treatment further lowers PH. Brush the walls and floors after 24 hours and if the stains faded restore pH to 7.2 with a similar quantity of Alkalinity UP.

Severe and Old Stains: Add at double the dose (2.4kg per 60,000). In addition Hydrochloric acid pre-dissolved in a bucket of water may be added to further lower pH as follows.

  • Vinyl Pools - 500 mL of hydrochloric acid per 10,000L
  • Fiberglass Pools - 1 liter of hydrochloric acid per 10,000L
  • Concrete pools - 2 liters of hydrochloric acid per 10,000L for plaster,pebble and colour quartz finish, for painted pools in good condition, use does for fiberglass. Most marks, stains or coloured streaks fade completely in 2-3 days. To complete the treatment for severe or old stains raise the pH back to 7.2 with 2kg dose of Alkalinity Up pre-dissolved in a bucket of water and pour in around the edge of the pool. Doses should be made at hourly intervals with the filter running.


Hydrochloric Acid use: The manufacture recommends treatments using hydrochloric acid should be done by professional. Extreme care should be taken BY ALL USERS.

Manuals & Attachments

Customer Reviews

Just bringing the balance back and this product did a great job. Had some stains on my steps as well as on the side of the pool. and they are gone. Great product I would recommend it highly.

Review by Andrew J on July 10, 2019

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